CN105457854B - Toward the device and method thereof of tube surface coating adhesive - Google Patents

Abstract

The present invention relates to a kind of device and method thereof of past tube surface coating adhesive, the equipment includes support frame, it is provided with spray assembly in the support frame and support frame inner bottom surface is set for driving pipe fitting mobile and the flatcar of rotation, the spray assembly includes that bottom is provided with the elongated charging box of opening and the positioning components for adjusting elongated charging box position, and the control assembly for limiting opening position output amount of binder, coating method includes derusting being carried out to pipe fitting and to pipe heating, and adhesive is coated in the surfaces externally and internally step of pipe fitting by spray assembly again.It is lower less with energy consumption with the cost of manufacture of the equipment to tube surface coating adhesive, and the coating time is very short, the effect for applying adhesive is highly desirable.

Description

Apparatus and method for applying adhesive to surface of pipe

technical field

The present invention relates to a device for applying adhesive to the surface of a pipe, and a method for applying the adhesive to the surface of a pipe using the device.

Background technique

The inner and outer surfaces of the steel pipe are coated with an adhesive, which not only has the properties of anti-corrosion and impact resistance, but also prevents the liquid inside from being polluted. For this reason, the inner and outer surfaces of the steel pipe are coated with adhesive. In the prior art, coating steel pipe is to use an intermediate frequency furnace to heat the steel pipe to 180-200 ℃, and then take out the heated steel pipe and use an extruder to extrude sheet-like glue and polyethylene to wrap the inner and outer surfaces of the steel pipe respectively. , when the winding is completed, put it into water for cooling, and after cooling, it is made into a steel pipe coated with adhesive. Although this method of coating the steel pipe can also make it have properties such as anti-corrosion and impact resistance, but the process of winding the sheet-like glue and polyethylene not only takes a relatively long time, but also has a relatively high production cost; , Because the weld on the steel pipe basically protrudes from its outer surface, if sheet glue and polyethylene are used to make the steel pipe adhesive, it is very easy to make the adhesive at the welded part of the steel pipe less than the predetermined thickness, and There will be seams between adjacent sheets of glue, so this way of applying the adhesive makes the steel pipe not have very ideal anti-corrosion and impact resistance properties.

The title of Chinese Patent Announcement No. 204278351U is "An Automatic Plastic Coating Machine for Large-caliber Anticorrosion Pipes" and a solution is proposed. This large-diameter anti-corrosion pipe automatic plastic coating machine is composed of a roller device, a vulcanization device, and a lifting device. Among them, the idler device is composed of an idler base and an idler group. The idler base is symmetrically arranged at both ends of the vulcanization device, and the idler group is fixed on the idler base. The vulcanization device is composed of a powder storage tank, a high-pressure air chamber, a support The supporting frame is movably arranged on the lifting device, and the powder storage tank and the high-pressure air chamber are fixedly installed on the supporting frame in turn; the lifting device is composed of a lifting base, a lifting gear motor, a screw elevator, and a connecting shaft. The screw elevator is rectangular. Evenly distributed on both sides of the lifting base, the connecting shaft is fixedly mounted on both sides of the lifting base and connected between the screw elevators, and the lifting and deceleration motor is connected with the connecting shaft for transmission. Although this automatic plastic coating machine can fully automatically coat large-diameter steel pipes, it is proposed that the coating speed is fast, the production efficiency is high, and it is highly innovative. The powder in the powder storage tank is sprayed to the surface of the heated steel pipe through the high-pressure air chamber. The high-pressure air chamber must use a large air pressure during the process of spraying the powder, otherwise the powder will not easily adhere to the outer surface of the steel pipe, and On the one hand, spraying powder with atmospheric pressure will increase the production cost. On the other hand, because the air pressure will not spray the powder on the surface of the steel pipe very uniformly, the adhesive on the steel pipe coated with this automatic plastic coating machine is not very uniform. The uneven binder will affect the quality of the composite pipe; at the same time, because the gas will directly contact the steel pipe during the powder spraying process, the temperature of the steel pipe can be greatly reduced, and if the temperature of the steel pipe is reduced, if the powder is sprayed, it will affect the Its quality, and the temperature of the gas sprayed with the powder cannot be increased. If the gas temperature is increased, the powder will be bound. Therefore, the use of gas spraying powder will also reduce the quality of the coated steel pipe; The bottom of the steel pipe is sprayed with powder through the high pressure air chamber, so this kind of plastic coating machine can only spray the outer surface of the steel pipe, but cannot spray the inner wall of the steel pipe, even if the spray gun is used to enter the pipe through electrical control. The inner wall of the pipe is sprayed, and the spraying efficiency is very low, and there are problems such as uneven spraying, which affects the quality of the steel pipe.

In addition, Chinese Patent No. 103920620 A is named "Large-diameter plastic-coated composite steel pipe coating and heating device", which uses a primary heating furnace, a plastic coating mechanism, a conduction frame and a secondary heating furnace, among which the plastic coating mechanism consists of the above It consists of a material box, a first spraying unit, a second spraying unit and a powder recovery bin. The first spraying unit and the second spraying unit are arranged in anti-parallel to each other. The first spraying unit and the second spraying unit are respectively formed by a positive pressure powder blowing mechanism. and a negative pressure powder suction mechanism arranged opposite to it, the left end of the positive pressure powder blowing mechanism is provided with a feeding box connected by a feeding pipe, and the right end of the negative pressure powder suction mechanism is provided with a powder feeding pipe connected by a powder feeding pipe. Material recycling bin. In the process of spraying the adhesive, the steel pipe heated by the primary heating furnace is guided by the conduction frame and dropped into the spraying mechanism section for two-way adsorption spraying, that is, the two ends of the pipe body are aligned with the rotating spraying head and the rotating powder suction When the first spraying unit is spraying, the powder in the feeding box is collected into the powder tank by the cyclone collector of the positive pressure powder blowing mechanism, and then the valve pneumatic actuator is opened. Under the action of spraying in the direction of the rotating spraying head, the rotating powder suction head of the negative pressure powder suction mechanism sucks the powder under the action of the suction fan, and sprays the material at one end and absorbs the material at the other end. The rotation of the rotary spraying head and the rotary powder suction head, and then the semi-finished product sprayed on one end is sent to the second spraying unit, and the other end of the pipe body is sprayed according to the same principle. Although the device can coat the inner and outer surfaces of the steel pipe by spraying material at one end and sucking material at the other end, the sprayed material will not spread evenly in all areas during the process of extending outward after being sprayed from the rotary spraying head. , and the gas will also reduce the temperature of the steel pipe, so the uniformity of the plastic coating layer sprayed on the steel pipe is relatively poor and the production cost is relatively high.

SUMMARY OF THE INVENTION

The task of the present invention is to provide a device for applying adhesive to the surface of pipe fittings by directly spraying powder reciprocatingly on the surface of pipe fittings in a controlled manner to solve the problems of high energy consumption, long coating time and high manufacturing cost.

Another task of the present invention is to provide a method for applying adhesive to the surface of a pipe.

The equipment for applying adhesive to the surface of pipes proposed by the present invention includes a support frame, a spraying assembly is arranged in the support frame, and a flat car is arranged on the inner bottom surface of the support frame to drive the pipe to move and rotate. The spraying assembly It includes an elongated charging box with an opening at the bottom, a positioning assembly for adjusting the position of the elongated charging box, and a control assembly for limiting the amount of adhesive output from the opening; the support frame includes four vertical rods and two horizontal bar pieces that are respectively fixed between two adjacent vertical bar pieces with a certain distance, and each vertical bar piece is installed with an induced draft fan for reducing temperature.

The spraying components are provided with 2-9 pieces, and the long charging box in each spraying component includes a trapezoidal piece and a rectangular piece connected with the lower end of the trapezoidal piece and provided with an opening on one side of the bottom surface, and a rectangular piece arranged on the trapezoidal piece. and a rectangular frame on both sides of the rectangular piece, and a positioning assembly is arranged on the rectangular frame.

The positioning assembly includes a limit rod installed on the rod-shaped member in the support frame, a main motor and an auxiliary motor are installed on the limit rod, and a pulley arranged on the upper surface of the rectangular frame. The output shaft of the main motor There is a transmission belt connected with the pulley. The control assembly includes bearings respectively installed on the inner surfaces of the rods below the two rectangular frames, a circular rod connected with the two bearings, a cross-plate member arranged on the circular rods, and a cross-plate member fixed on the outside of the cross-plate member. A vertical plate member, and a limiting device for driving the movement of the horizontal plate member is installed on the side of the vertical plate member.

The flat car includes a rectangular frame and a rotating wheel mounted on both sides of the rectangular frame and driven by the first drive assembly for supporting the pipe, and a rotating wheel and A second drive assembly for driving the rotating wheel. The first drive assembly includes a motor mounted on a rectangular frame, a reducer driven by the motor, and bevel gears that are respectively arranged on the output shaft of the reducer and the rotating wheel shaft to mesh with each other; the second drive assembly includes a motor mounted on the rectangular frame. The motor on the frame and the speed reducer driven by the motor are respectively provided with gears connected by chains on the shaft of the rotating wheel and the output shaft of the speed reducer.

The method for applying adhesive to the surface of the pipe with the above-mentioned equipment includes the following steps: first, derusting the pipe, then heating the derusted pipe to 200-230°C and then inputting it to the support pipe device, and then spraying the component to remove the adhesive. The mixture is coated on the inner and outer surfaces of the pipe fittings.

The step of coating the adhesive on the outer surface of the pipe by the spraying assembly includes sequentially feeding epoxy powder, plastic powder and polyethylene powder into the elongated charging box, and sequentially applying the three materials to the surface of the pipe and the step of applying the adhesive on the inner surface of the pipe through the elongated charging box includes applying epoxy powder to the elongated charging box, and coating the inner surface of the pipe with the epoxy powder. The epoxy powder coating pipe fitting time is 22-25 seconds, the coating thickness is 120-350 microns: the plastic powder coating pipe fitting time is 60-120 seconds, the coating thickness is 100-170 microns; polyethylene powder coating The fitting time is 60-120 seconds, and the coating thickness is 1.8-3.7 mm.

There are 2-9 spraying components in the equipment for coating the surface of the pipe with adhesive proposed by the present invention, and each spraying component uses the powder in the long charging box to directly spray it to the surface of the pipe through the opening. Surface, and the long charging box can put different kinds of powder in sequence, the tube can successfully coat the adhesive during the orderly movement and rotation process, and during the powder spraying process, the powder can be passed through the opening energy. The output is very uniform, and it will not directly reduce the temperature of the pipe fittings, and the power consumption of the limit device is relatively small, so the production cost of using this equipment to apply adhesive to the surface of the pipe is low and consumption. The energy is relatively low, and the coating time is very short, and the effect of coating the adhesive is ideal; at the same time, because the limit device in the control assembly adjusts the spacing of the openings by driving the horizontal plate to move, it is very convenient. Adjust the output of the adhesive, and the flat car only uses components such as a rectangular frame and a reducer driven by a motor, so the structure of the equipment is quite simple; The use of the induced draft fan for reducing the temperature will not affect the quality of the powder and the support frame, and will not reduce the temperature of the coated heating pipe fittings.

Description of drawings:

1 is a schematic view of the appearance structure of an embodiment of the apparatus for applying adhesive to the surface of a pipe according to the present invention;

Accompanying drawing 2 is the appearance structure schematic diagram of the vertical member on the support frame in Fig. 1;

Accompanying drawing 3 is the appearance structure schematic diagram of the long charging box in Fig. 1;

Accompanying drawing 4 is the appearance structure schematic diagram of the trapezoidal piece and the rectangular piece section in Fig. 3;

Accompanying drawing 5 is the appearance structure schematic diagram of bearing and circular rod in FIG. 3;

6 is a schematic view of the appearance structure of the limiting device in FIG. 3;

Accompanying drawing 7 is the appearance structure schematic diagram of the screw rod fixed on the vertical plate member in FIG. 5;

Accompanying drawing 8 is the appearance structure schematic diagram of the position adjustment assembly in Fig. 1;

Accompanying drawing 9 is the enlarged appearance structure schematic diagram of the installation motor part in FIG. 8;

Accompanying drawing 10 is the appearance structure schematic diagram of the flat car in FIG. 1;

11 is a schematic diagram of the appearance structure of the first drive assembly in FIG. 10;

12 is a schematic view of the appearance structure of the second drive assembly in FIG. 10;

FIG. 13 is a schematic view of the appearance structure of the connection between the rotating wheel and the gear in FIG. 12 .

Detailed ways:

Referring to FIG. 1 and FIG. 2 , the figures show the appearance structure of an embodiment of the apparatus for applying adhesive to the surface of a pipe according to the present invention. The equipment includes a support frame 1 , a flat car 2 , a rail 3 , and a spraying component including a long charging box 4 , a positioning component 5 , and a control component 6 .

The support frame 1 given in this embodiment includes four vertical rod members 11 and two horizontal rod members 12 that are respectively fixed between two adjacent vertical rod members 11 at a certain distance, and each vertical rod member The induced draft fan 13 for lowering the temperature is installed in each of the 11 , and the induced draft fan 13 reduces the temperature of the vertical rod member 11 and the horizontal rod member 12 by means of drafting, so as to maintain their safety performance. There are four spraying assemblies provided in this embodiment, and every two spraying assemblies are arranged on the same straight line, and the spraying assemblies on the same straight line can apply adhesive to the pipe fittings. Therefore, four spraying assemblies are arranged on the same line. The assembly can apply adhesive to two pipes 7 at the same time, and can also apply adhesive to the pipes 7 at a certain time interval; at the same time, because the spraying assembly is a component used to apply adhesive to the surface of the pipe 7 , the number of spraying components can be adjusted according to the length of the pipe fittings 7 and increasing the number of coating pipe fittings 7, usually 2-9 spraying components can be set; The box 4 and the position adjustment assembly 5 for adjusting the height of the long charging box 4, and the control assembly 6 for controlling the output of the adhesive, wherein, on the opposite two crossbar members 12 are provided for connecting the position adjustment Rod 14 of assembly 5 . The flat car 2 given in the present embodiment is arranged on the track 3, and the two rails 3 enter the two sides of the support frame 1 respectively, so that the flat car 2 drives the pipe fitting 7 into the lower part of the spraying assembly, and uses the spraying assembly to reach the pipe fitting 7. Surface coated with adhesive.

Referring to FIGS. 3 to 9 , these seven diagrams show the overall structure diagram of the appearance of an embodiment of the spraying assembly, wherein, FIGS. 3 to 7 show the appearance structure diagrams of the long charging box 4 and the control assembly 6 , while FIGS. 8 and 7 9. A schematic diagram of the appearance and structure of the positioning assembly 5 is given.

The long charging box 4 includes a trapezoidal piece 41 whose vertical section is a trapezoid, a rectangular piece 42 connected with the lower end of the trapezoidal piece 41 and provided with an opening 43 on one side of the bottom surface, and a rectangular piece 41 arranged on both sides of the trapezoidal piece 41 and the rectangular piece 42 . The frame 44, the rectangular frame 44 is used to fix the trapezoidal member 41 and the rectangular member 42, and the parts in contact with the positioning assembly 5. Therefore, the rectangular frame 44 can be a rectangular frame or other shaped parts, and in each rectangle A pulley 51 is installed on the upper surface of the frame 44; the rectangular member 42 is composed of an L-shaped plate member 421 and a vertical plate member 422, and an opening 43 is provided between the L-shaped plate member 421 and the lower surface of the vertical plate member 422, and The width of the opening 43 is defined by the control assembly 6 .

The control assembly 6 includes bearings 61 respectively mounted on the inner surfaces of the rods below the two rectangular frames 44, a circular rod 62 connected with the two bearings 61, and a transverse plate 63 arranged on the circular rods 62 and fixed on the The vertical plate member 64 on the outer side of the horizontal plate member 63, and a limit device for driving the horizontal plate member 63 to move is installed on the side of the vertical plate member 64, and the horizontal plate member 63 can control the opening 43 under the driving of the limit device. Width; the limiting device includes a motor 65 arranged on the side of the vertical plate member 64, a gear 66 arranged on the rotating shaft of the motor 65, and a screw rod 67 fixed on the vertical plate member 64, and the gear 66 is connected to the screw rod. 67 are engaged, and when the motor 65 drives the gear 66 to rotate, the vertical plate member 64 and the horizontal plate member 63 can be driven to move, so that the width of the opening 43 can be controlled.

The positioning assembly 5 includes a limit rod 52 installed on the rod-shaped member 14 in the support frame 1 and a motor installed on the limit rod 52. The motor includes a main motor 53 for driving the long charging box 4 to move up and down and the auxiliary motor 54 for driving the long charging box 4 to move laterally, and the pulleys 51 respectively arranged on the upper surface of the rectangular frame 44, wherein the output shaft of the main motor 53 is provided with the pulley 51 on the output shaft. The connected transmission belt 55, the rotation of the main motor 53 can shrink or extend the transmission belt 55 to adjust the distance between the long charging box 4 and the pipe 7; the output shaft of the auxiliary motor 54 is provided with a main gear 56, and the main gear The two sides of the 56 are provided with auxiliary gears 57 meshing with them. The rotation of the auxiliary motor 54 can make the long charging box 4 move laterally to adjust the distance between two adjacent long charging boxes 4 .

Referring to FIG. 10 to FIG. 13 , these four figures provide a schematic diagram of the appearance structure of an embodiment of the flat car 2 . The flat car 2 includes a rectangular frame 21 and a rotating wheel 22 mounted on both sides of the rectangular frame 21 for supporting the pipe 7 and driven by the first drive assembly, and is provided at the bottom of both sides of the rectangular frame 21 and is in contact with the track 3. The rotating wheel 23 and the second driving assembly for driving the rotating wheel 23, wherein, square pipes 24 are respectively installed on both sides of the rectangular frame 21, and the first driving assembly includes a motor 25A installed on the square pipe 24 and a The reducer 26A driven by the motor 25A, and the bevel gears 27 which are respectively arranged on the output shaft of the reducer 26A and the shaft of the rotating wheel 22 to mesh with each other; The driven reducer 26B is provided with gears 29 connected by a chain 28 on the shaft of the rotating wheel 23 and on the output shaft of the reducer 26B, respectively. The first drive assembly is a component used to drive the pipe 7 to rotate. When the motor 25A drives the rotating wheel 22 to rotate, the pipe 7 can be rotated to apply adhesive; the second drive assembly is used to drive the flat car 2 along the track 3. For the moving parts, when the motor 25B drives the gear 29 to rotate, the chain 28 drives the rotating wheel 23 to rotate to adjust the position of the flat cart 2 .

The method of using the above-mentioned equipment to coat the adhesive on the inner and outer surfaces of the pipe fitting 7 includes the following steps: first, the pipe fitting 7 is derusted. Then put the rust-removed pipe fitting 7 into a heating furnace for heating. The heating furnace can use an infrared heating furnace or other types of heating furnace. When the pipe fitting 7 is heated to 200-230 ℃, it will be heated again After the pipe piece 7 is taken out from the heating furnace, it is input to the flat car 2, that is, the two end regions of the pipe piece 7 are respectively placed between the two rotating wheels 22, and then the adhesive is applied to the pipe piece 7 by the spraying assembly. the inner and outer surfaces. The adhesives include epoxy powder, plastic powder and polyethylene powder. During the process of coating the outer surface of the pipe fitting 7 with the three kinds of adhesives with the spraying assembly, the epoxy resin is sequentially input into the long charging box 4. Powder, plastic powder and polyethylene powder, the input amount of each powder can be determined according to the diameter of the pipe fitting 7, wherein the epoxy powder coating time is between 22-25 seconds, and the coating thickness is 120-350 microns : The plastic powder coating time is 60-120 seconds, and the thickness is 100-170 microns; the polyethylene powder coating time is 60-120 seconds, and the thickness is 1.8-3.7 mm; In the process of mixing, the long charging box 4 is first input into the pipe fitting 7, because the inner surface of the pipe fitting 7 only needs to be coated with epoxy powder, an adhesive, so the long charging box 4 is filled with Epoxy powder, the input amount of the powder can also be determined according to the diameter of the pipe fitting 7, the epoxy powder coating time is between 22-25 seconds, and the coating thickness is 120-350 microns.

Claims (9)

1. toward the equipment of tube surface coating adhesive, it is characterised in that: the equipment includes support frame, is arranged in the support frame There is spray assembly and support frame inner bottom surface is set for driving pipe fitting mobile and the flatcar of rotation, the spray assembly includes bottom Portion is provided with the elongated charging box of opening and the positioning components for adjusting elongated charging box position, and for limiting opening portion The control assembly of position output amount of binder；Support frame as described above include four vertical bar parts and be separately fixed at adjacent two vertical bar parts it Between two between be separated with the transverse bar of certain distance, and the air-introduced machine being mounted in each vertical bar part for reducing temperature.

2. equipment according to claim 1, it is characterised in that: the spray assembly is provided with 2-9, and each is sprayed Apply the elongated charging box in component include ladder shape part and connect with ladder shape part lower end and bottom surface side be provided with the square of opening Shape part, and the rectangle frame of ladder shape part and rectangular-shaped piece two sides is set, and is provided with positioning components on rectangle frame.

3. equipment according to claim 1, it is characterised in that: the positioning components include being mounted on rod like parts in support frame On gag lever post, main motor and auxiliary-motor are installed on gag lever post, and the pulley of rectangle frame upper surface is set, it is described The transmission belt connecting with pulley is provided on the output shaft of main motor.

4. equipment according to claim 1, it is characterised in that: the control assembly includes being separately mounted to two rectangles Bearing below frame on rod piece inner surface and circular pin connect with two bearings, and the transverse slat part that is arranged on circular pin with The riser part being fixed on the outside of transverse slat part, and the limiting device for driving transverse slat part mobile is installed in the side of riser part.

5. equipment according to claim 1, it is characterised in that: the flatcar includes rectangular frame and is mounted on rectangular frame It is used to support the rotating wheel of pipe fitting driven by the first driving assembly on two sides, and two side bottom of rectangular frame is set And the rotating wheel being in contact with track and the second driving assembly for driving rotating wheel.

6. equipment according to claim 5, it is characterised in that: first driving assembly includes being mounted on rectangular frame Motor and the retarder that is driven by motor, and be separately positioned on intermeshing umbrella on reducer output shaft and rotary shaft Gear；Second driving assembly includes the motor being mounted on rectangular frame and the retarder being driven by motor, and is being rotated On the axis of wheel be respectively arranged with the gear connected by chain on the output shaft of retarder.

7. the method for the coating pipe surface adhesive of equipment described in claims 1 or 2 or 3 or 4 or 5 or 6, it is characterised in that The following steps are included: derusting first to pipe fitting, then support tube will be input to after 200-230 DEG C of the pipe heating of derusting On device, then the surfaces externally and internally by spray assembly by adhesive coated in pipe fitting.

8. according to the method described in claim 7, it is characterized by: adhesive is coated in the appearance of pipe fitting by the spray assembly Including successively inputting epoxy powder, plastics powder and polyethylene powders into elongated charging box in the step of face, and successively by three Kind material is coated to tube surface；And by elongated charging box by adhesive be coated in pipe fitting inner surface the step of in include to Coating input epoxy powder, applies inner surface of pipe fitting for epoxy powder in elongated charging box.

9. according to the method described in claim 8, it is characterized by: the epoxy powder coating pipes time be 22-25 seconds, Coating layer thickness is 120-350 microns: the plastics powder coating pipes time is 60-120 seconds, and coating layer thickness is that 100-170 is micro- Rice；The polyethylene powders coating pipes time is 60-120 seconds, and coating layer thickness is 1.8-3.7 millimeters.